25646003966 has 12 divisors (see below), whose sum is σ = 42284114376. Its totient is φ = 11657274420.

The previous prime is 25646003963. The next prime is 25646003989. The reversal of 25646003966 is 66930064652.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25646003966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25646003963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52987370 + ... + 52987853.

It is an arithmetic number, because the mean of its divisors is an integer number (3523676198).

Almost surely, 2^25646003966 is an apocalyptic number.

25646003966 is a deficient number, since it is larger than the sum of its proper divisors (16638110410).

25646003966 is a wasteful number, since it uses less digits than its factorization.

25646003966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105975247 (or 105975236 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 25646003966 in words is "twenty-five billion, six hundred forty-six million, three thousand, nine hundred sixty-six".